Link to the source and easy rewriting of synonyms, advise?

Question

Search Engine Optimization

Hello dear friends!
I read a lot of articles and opinions differ everywhere ... To
begin with, the site is news, finance and business and in English, all articles are taken from other sites, all articles are automatically rewritten by synonyms without losing their meaning, up to about 20 words per article but often you can’t get 10 ...
Is it worth doing this, or is it pointless?
And yet, they say that you need to provide a link to the source, as I understand it, to the site itself or to the article?
I can specify, but since I rewrite, should I indicate the link or not ??
But they also say that you don’t need to rewrite, just copy-paste with an indication of the source, and if not, then a full rewrite ...
Sorry for these stupid questions, but I’m honestly confused and I don’t understand anything anymore ...
Please explain, thanks!

Answer 1

synonyms are scorched, including a penalty for unnaturalness
if rewriting - a link, if alteration - not necessarily

Answer 2

Sue for synonyms.

Answer 3

Is it worth doing this, or is it pointless?

I ran about 100,000 characters through sinoni.men , the text changed outwardly, uniqueness appeared and I don’t put any links.
Subject: cryptocurrency.
The search page flew with a bang.